Theodor stjchland



(No Model.) 1'

T. SUGHLAND.

CHAIR.

No. 449,356. Patented Mar. 31, 1891.

FIGHZ.

In'l/enibi. I/YeOJor Su/cZZaJuZ, By

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THEODOR SUOHLAND, OF BERLIN, ASSIGNOR TO VALENTIN LANDSBERG, OF POSEN, GERMANY.

CHAIR.

SPECIFICATION forming part of Letters Patent No. 449,355, dated March 31, 1891. Application filed August 27, 1888. Serial No. 283,887. (No model.) Patented in Germany February 10, 1888, No. 44,374,

To aZZ whom it may concern.-

Be it known that I, THEODOR SUCHLAND, of the city of Berlin, Prussia, Germany, have invented a certain new and useful Improved Chair with Adjustable Seat, (a patent for which was granted to me in Germany, dated February 10, 1888, No. 44,374,) of which I declare the following to be a specification.

This invention relates to an improved chair in which the seat is adjustable, so that the same can be raised or lowered, as may be desired, and will be securely held in any position by means of appropriate clamping-levers, which can be released from their engagement with the vertical guide-rods by means of a knob or handle arranged so as to be readily operated on.

In the accompanying drawings, Figure 1 is a vertical section of the chair, and Fig. 2 is a horizontal section of the same.

Vertical rods to are fixed in appropriate manner to the lower surface of the framework of the'seat h or to the seat itself and arranged to slide up and down in suitable tubes or guides 12, preferably either fixed to or located within the legs of the said chair. The upper ends of the tubes 1) are either slotted or are screwed or fixed to suitably-formed shells or sleeves 0, cut away at c',s0 that the case-hardened ends d of the clamping-levers (Z can firmly bite on the rods a, fixed to the seat-frame h.

The clamping-levers 01 turn on the bolts cl, which run through the rail or rails e of strong sheet or thin bar or single iron, the ends of which can be bent over to form the sleeves c, or the sleeves a can be made of a separate piece of metal and be screwed or otherwise attached to the rail or rails e or the frame of the chair. The opposite ends of the clamping-levers d are carried by springs f, of helical form, and hung in the eyes f but fiat springs can be used. I prefer, however, to employ helical springs, as the same are not so liable to be ruptured as fiat or leaf springs.

The clamping-levers d will allow the seat to be raised, but will allow no downward movement until the said levers are brought out of engagement with the rods a by operating the knob or handle 2'.

As soon as the seat It has been raised to the desired height, the hardened tips (Z of the levers d will securely bite 011 the rods a, and thus prevent all downward movement of the seat h, which is thus held in raised position, so that the heavier the weight is on the seat the firmer will be the engagement of the ends (1 of the clamping-levers (1 with the rods a.

In order to release the levers (Z from their engagement with the rods 0, and allow the seat It to be lowered, I employ a Ll-formed bent rail 7;, the ends of which are arranged to turn 011 suitable hinges Z. The forward end of the rail is carried by a helical spring 0, hung in an eye 0, said rail being, furthermore, provided with a knob or handle 2'. On each side of the rail is is a lug m, carrying a bolt 71 or its equivalent, which latter lies immediately above the rear ends of the clamping-levers cl without in any way preventing the lowering of the same.

If it is desired to lower the seat, the knob or handle 2', and consequently the lugs m and rail 7c, are depressed until the bolts 92- or their equivalents come in contact with the rear arms of the lovers cl, press the same downward, and release the tips d from their en gageme-nt with the rods a, so that the said seat can be readily lowered. As soon as the knob or handle 2' is released the lever ll; will be immediately raised by the spring 0 and the rear ends of the clamping-levers cl by the springs f, so that the forward ends of the said clamping-levers will be caused to imme diately bite on and engage with the rods a.

lVhat I claim as new, and desire to secure by Letters Patent, is

1. In a vertically-adjustable chair-seat, the combination, with the seat and frame, the tubes 12, the sleeves c c, and the rods a, working therein, of the levers cl, having the hardened sharp tips (1 engaging with said rods by biting thereon, whereby the seat is held at the desired height, substantially as described.

2. In a vertically-adj ustable chairseat constructed as above described, the combination,

with the sliding reds a and levers (Z, engagmy name in the presence of two subscribing ing therewith, 0f the bent lever or hinged rail Witnesses. 70, provided with the lug m, and bolt or stud 1 T n, engaging with the levers cl, whereby the THEODOR SUCHLAB D seat is lowered when desired, substantially as Witnesses: described. ANTHONY STEFFEN,

In Witness whereof I have hereunto signed B. ROI. 

